Electric switch.



G. H, HART. ELECTRIC swnc'u. APPLICATION FILED'JUNE [1. 1916. 'I

Patented Apr. 17,1917,

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G. H. HART.

ELECTRIC'SWITCH. APPLICATION FILED-JUNEIL m5.

Patented A nffi, 1917 Specification of Letters Patent.

UNITED STATES PATENT OFFICE.

nnnormo swg'ron;

rat eeanpr. 17, 1917.

Application filed June 17, 1916. Serial No. 104,180.

To all whom it may concern."

Be it known that I, Gnon'or. H. HART, a citizen of the United States,residin at West Hartford, county of Hartford, tate useful Improvementsin Electric Switches, .of which the following is a full, clear, and

exact description. y

My invention relates to electric switches, and has for its object toprovide a snap, switch which,can be operated to make and break a circuitby an oscillating movement oftheactuating member. It further has for itsobject to produce such a. switch in which the actuating member iscepablenof a. completerevolution in one direction, making and breaking acircuit a plurality of times during; a continued movement of revolutionin one direction. a

A further object of my invention is to provide an oscillating switchwith a removablehandle-fixed against rotation relatively to the spindlein either direction and adapted to hold the cover of the switch in placewith a yielding spring pressure.

The fllowing is a. description of an embodiment of my invention,reference being had 'to the accompanying drawings, in which:

Figure 1 shows a plan view of a switch embodying my invention;

Fig. 2 is a section on line 2 2, Fig. 1;

-Fig. 3 is a plan view of the base and portions directly carried-thereby;

35 Fig. 4. is a detail of the stops and carrying member; a Fig. 5 is anenlarged perspective view of one stop v Fig. 6 is a side elevation ofthe spindle and parts carried thereby. tion on line (3-4) Fig. 6.

Fig. "F is a .bottom view of the parts shown in Fig-6.

Fig. 7 is section of the handle. p

' Figs. 8 to 12 are plan views of portions illustrating various steps inthe operation of the switch.

Referring more particularly to the draw', ings, 1 is a switch base madeof insulating material, 2 is a spindle-carrying-member having a chamber3 and radial grooves which in the present instance are by 90.

This spindie-carrying-member is secured to the base'by a nut 5. In theradial grooves are two step pins 6-6 L-shape, their inner ends beingprovided with a cam of Connecticut, have invented certain new andplaced: from one another by 90.

.said handle bei'n provided with an internal relatively to the other andto thebody of Fig. 6 is :1. seoseparated surface wh ose l: igh pointcorresponds with the medial llne oi the step pin.- 8 is spindlerevolubly mounted. in said spindle-carrying-member 2" and securedtherein by a clip 9. This spindk carries two fixed thrus members 10-10,separated by 180 in the present embodin lent. This angular rationdepends on the angular-displacement of the two stop pins and is.180-when said stop pins are spaced 90 from one another. Mounted on thespindle immediately above the cams 10-10 and movable relatively'theretois a stop" plate 11, whose periphery is providedwith recessedportions so as to form equally spaced shoulders .12, the shoulders inthe present. instance being dis On the' upper end of the spindle 8 is-ahandle '13,

bnshin 14: which carries an internally spew-threaded ,ocket 1%,. thebushing and socket being provided with angular surfaces so as to preventthe rotating of one,

the handle. The body of thehandle is molded about .thebushing, which isheld within the. body of the handle so as 'to be fixed relativelythereto by thep'rojection 15 extending into a recess in the handle. Thebushing is ro ided upon .faee with a notch, 16 which notch engagesprojections 17 ilpona plate 18 which is secured to the spindle. By thesemeans the handle can be secured on the S indle, being screwed thereon,and then held from turning in either direction. In screwi ngit home itis pulled away from the switch'and thereafter released so as to bringthe )rojecti0ns"17 upon the plate 18 into engagement with the notch 16upon the bushing; Such engagement prevents the handle from beingturnedsrelatively to the spindle in either direction unless it is drawnaway from the ilate 18 against the action of therspring 19. The actionof the spring 1.) draws the handle down upon the cover 20, so as to hold1he cover in place and hold these notches 111d projecth'msiu cngagwment. The plate 18* can be applied. and removed from the spindle by alateral motion by reason of 1119, presence of the slot "31 therein. Theplane edges of the slot vngnp'p parallel faces iormed upon the sides ofthe spindle notche; and the plate in is thus held from turn lng.

Spring ends 2). hon-ring upon th steps 6-6 normally tend to mow the stoppin llt i is a switch arm 24, which thus 85 I face on the next 6.6 nerends. The movement toward the center of the switch and to hold theminline with the pirojections 12 upon the stop plate-member. hese springends are formed by a broken spring ring WhlCh' lies 5 in a new in theperiphery of the member ends 22 ofthespring prevents the ring frommoving so that its ends will always properly engage the stop pins 66'.nected to but insulated from the stop plate step by step.- -25-25 arecontacts which are engaged and disengaged by the switch arm as. it makesthe successive steps. The switch arm'is moved with a snap-action by thespring 26, whose two ends embrace studs 27 and 28, connected to thespindle and stoplate respectively in the well known manner.

his sprin restores the arts to normal position igs. 8 or 12)-1f thehandle is moved somewhat but not enough to actuate theswitch arm. Thuswhen the parts are in the position shown in Fig. 10 the distended spring26 will restore them to the position shown in Fig. 8, the-pin 6 beingagain moved outwardly during the returnin movement of the spindle.

' he action of the switch is as follows: When the parts, are in theposition shown in c'auses'a thrust member to move the stop pin 6outward. This is an idle movement. After the thrust member has passedthe cam suriaoe upon this stop pin 6, it engages the cam it outward.This removes the second stop .'pin 6' from a restrained shoulder of thesto plate member which then swings around and until the second precedingshoulder engages the stop pin 6 which is now returned to its normalposition, as shown in Fig. 12. A further movement ofythe handle in thesame direction causes-a thrust member to move the stop pin 6 outwardly,an idle movement, .and causes a thrustmember to then move the stop'pin 6outward so to release the shoulder that it has been'restraim ing,permitting the stop plate member to' revolve another 90"until the sameshoulder engages with the stop pins 6, as shown in Fig. 8.. A reversemovement of the handle produces reverse results. a

A thrust member after it has-forced out a stop pin, so as to release thestop plate, normally moves backward, so as to liebehind that stop pin,this being due to the action of the spring 26. When the outer ends ofthe two stop pins lie in the same cutaway portion a thrust member liesbetween their inner ends when the parts are in normal position. When theouter ends of two adjacent stop pins are onopposite sides of aprojection on the stop plate, there is no'thrust member between them orbetween their ine pin 23 standing in the paths of the Rigidly con moveswith it Fig. 8 a clock-wise movement of the handle stop pin 6 and forcesing spring, means of the stop .pin.

cations without departing from the spirit;

thereof or the scope of the appended claims,

What I claim is: 1. In a snap switch capable of being-actuatedby anoscillating movement, the combination of abase, a spindle-carring-member thereon having a plurality o radialrecesses, sto'p pinslocated in said recesses and having inner cam surfaces, a spindlemovably mounted in said s indle-carrying member, vthrust members xed onsaid spindle and adapted to engage said cam surfaces:

and a stop plate revolubly carried by said spindle and provided withalternate cutaway portions and projections forming sub stantiallyequally spaced shoulders adapted to engage said stop pins, a. stop plateactuating spring, and means for holding said stop pins inshoulder-engaging position, the cam surfaces of two pins being separatedby the axis of one of said thrust members when their outer ends are inthe same cutaway portion of said plate.

2. In a. snap switchcapable of being actuated by an oscillatingmovement, the com bination of a base, a spindle-carrying-member thereonhaving two radial recesses, stop pins located in said I ner-camsurfaces, a spindle movably mounted in said spindle-carrying member, aplurality of thrust members fixed on said spindle and adapted to engagesaid cam surfaces, a stop plate revolubly carried by said spindle andprovided with alternate cutaway portions and projections formingsubstantially equally spaced shoulders adapted to engage said stop pins,:1 stop-plate actuatfor holding said stop pins in shoulder-engaginposition, the an les between said recesses 'ing substantial y one: halfof the angle between said thrust inefnbers, the cam surfaces of two pinsbeing separated b the axis of one of said thrust members w en theirouter ends are in the same cutaway portion of said plate.

3. In a snap switch capable of being-actuated by an oscillatingmovement, the'oombination of a base, a'spindle-carr ing-member thereonhaving a plurality o radial recesses, stop pins located in saidrecessesand having inner cam surfaces, a spindle-movably mounted in saidspindle carryin member, two thrust members fixed on sai spindle adaptedto engage said cam surfaces successively and a stop late revolublycarried by sald spindle and provided with alternate cutaway portions andprojections recesses and having ingaging position, the cam surfaces oftwo-v pins being separated by the axis of. one 01'; said thrust memberswhen their outer ends are 1n the same cutavm y' portion of said plate,said recesses being located at an angle of 90 from each other andsaidthrust members being located at an angle of substantially 180 from eachother.

4. In an electric switch oapeble'of being actuated by an oscillatingmovement, the combination of a spindle, a holding plate thereomn handle,-a-'bi.1shing fixed in said handle, an internally threaded socket Withinsaid bushing movable longitudinally but not axially relatively thereto,a spring retrecting said socket Within said bushing,

said. plate having a. radial slot engaging the sides of said spmdle aiid. being reri ovshle from said. spindle amovement finre llel to saidslot, saidspjindli and plate vliming plane surfaces" engagingso as toprevent their relatively axial movement in either direction, said plateand bushing being provided with. stop surfaces located at an angle tothe walls of said slot preventing axial movement of said bushir grelatively to said plate and spindle gmd p1 eventing said plate movingrelatively'to said spindle 'in a direction parallel to its slot whensaid surfaces are in engagement said bushing look ing said plate uponsaid s )indle.

GEO GE 11.

